#2 Jinder Mahal

Former WWE Champion Jinder Mahal has been out of action for several months, and like Nia Jax, he too had to get knee surgery last year. There have been no reports to suggest if he's cleared to wrestle, but the injury timeline shows that he should be cleared to get in the ring once again by this time.
Mahal has not had any promising feuds since he lost his WWE title to AJ Styles, but this break could have been a good way to bring in fresh ideas to the table. His former 3MB partner, Drew McIntyre, who has had a good last few months, recently revealed that we will see a different Jinder once he returns.
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The former WWE Champion could perhaps align with a heel faction, perhaps Seth Rollins or co., who have lost AOP following the injury to Rezar. Or, if he stays as a babyface, he could begin a feud with Angel Garza and his mystery partner (Andrade will reportedly not be a part of WrestleMania 36).